DataProtectionSecurityStateEncoder.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / ServiceModel / System / ServiceModel / Security / DataProtectionSecurityStateEncoder.cs / 1 / DataProtectionSecurityStateEncoder.cs
                        

                        
                            //------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------

namespace System.ServiceModel.Security 
{
    using System.Text; 
    using System.Security.Cryptography; 

    public class DataProtectionSecurityStateEncoder : SecurityStateEncoder 
    {
        byte[] entropy;
        bool useCurrentUserProtectionScope;
 
        public DataProtectionSecurityStateEncoder()
            : this(true) 
        { 
            // empty
        } 

        public DataProtectionSecurityStateEncoder(bool useCurrentUserProtectionScope)
            : this(useCurrentUserProtectionScope, null)
        { } 

        public DataProtectionSecurityStateEncoder(bool useCurrentUserProtectionScope, byte[] entropy) 
        { 
            this.useCurrentUserProtectionScope = useCurrentUserProtectionScope;
            if (entropy == null) 
            {
                this.entropy = null;
            }
            else 
            {
                this.entropy = DiagnosticUtility.Utility.AllocateByteArray(entropy.Length); 
                Buffer.BlockCopy(entropy, 0, this.entropy, 0, entropy.Length); 
            }
        } 

        public bool UseCurrentUserProtectionScope
        {
            get 
            {
                return this.useCurrentUserProtectionScope; 
            } 
        }
 
        public byte[] GetEntropy()
        {
            byte[] result = null;
            if (this.entropy != null) 
            {
                result = DiagnosticUtility.Utility.AllocateByteArray(this.entropy.Length); 
                Buffer.BlockCopy(this.entropy, 0, result, 0, this.entropy.Length); 
            }
            return result; 
        }

        public override string ToString()
        { 
            StringBuilder result = new StringBuilder();
            result.Append(this.GetType().ToString()); 
            result.AppendFormat("{0}  UseCurrentUserProtectionScope={1}", Environment.NewLine, this.useCurrentUserProtectionScope); 
            result.AppendFormat("{0}  Entropy Length={1}", Environment.NewLine, (this.entropy == null) ? 0 : this.entropy.Length);
            return result.ToString(); 
        }

        protected internal override byte[] DecodeSecurityState(byte[] data)
        { 
            return ProtectedData.Unprotect(data, this.entropy, (this.useCurrentUserProtectionScope) ? DataProtectionScope.CurrentUser : DataProtectionScope.LocalMachine);
        } 
 
        protected internal override byte[] EncodeSecurityState(byte[] data)
        { 
            return ProtectedData.Protect(data, this.entropy, (this.useCurrentUserProtectionScope) ? DataProtectionScope.CurrentUser : DataProtectionScope.LocalMachine);
        }
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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